/*
 * Copyright (c) 2011-2025 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 * which is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 */
package io.vertx.core.internal.digest;

import java.security.GeneralSecurityException;

/**
 * Token signing contract.
 */
@FunctionalInterface
public interface Signer {

  /**
   * Sign the payload.
   *
   * @param payload what we sign
   * @return the signature
   * @throws GeneralSecurityException anything that would prevent signing
   */
  byte[] sign(byte[] payload) throws GeneralSecurityException;

}
